What potential security risks should be considered when working with sessions in PHP?

When working with sessions in PHP, potential security risks to consider include session hijacking, session fixation, and session data tampering. To mitigate these risks, it is important to use secure session handling techniques such as regenerating session IDs, using HTTPS to encrypt session data, and validating session data on each request.

// Start a secure session
session_start([
    'cookie_lifetime' => 86400, // 1 day
    'cookie_secure' => true, // Only transmit cookies over HTTPS
    'cookie_httponly' => true, // Prevent JavaScript access to cookies
]);

// Regenerate session ID to prevent session fixation
session_regenerate_id(true);